LiftMaster SL3000UL3 Owners Manual - Page 17

Wiring WARNING To reduce the risk of SEVERE INJURY or DEATH: • ANY maintenance to the operator or in the area near the operator MUST NOT be performed until disconnecting the electrical power and locking-out the power. Upon completion of maintenance the area MUST be cleared and secured, at that time the unit may be returned to service. • Disconnect power at the fuse box BEFORE proceeding. Operator MUST be properly grounded and connected in accordance with local electrical codes. NOTE: The operator should be on a separate fused line of adequate capacity. • ALL electrical connections MUST be made by a qualified individual. • DO NOT install ANY wiring or attempt to run the operator without consulting the wiring diagram. We recommend that you install an optional reversing edge BEFORE proceeding with the control station installation. • ALL power wiring should be on a dedicated circuit and well protected. The location of the power disconnect should be visible and clearly labeled. • ALL power and control wiring MUST be run in separate conduit. • BEFORE installing power wiring or control stations be sure to follow ALL specifications and warnings described below. Failure to do so may result in SEVERE INJURY to persons and/ or damage to operator. All power wiring should be on a dedicated circuit and well protected. NOTE: Calculated using NEC guidelines. Local codes and conditions must be reviewed for suitability of wire installation. 120Vac Power Wire 1/2 HP and Dual Motor 1 HP 16 Gauge up to 150 FT up to 75 FT 14 Gauge 250 FT 125 FT 12 Gauge 400 FT 200 FT 10 Gauge 650 FT 325 FT 8 Gauge 1000 FT 500 FT 4 Gauge 2200 FT 1100 FT WARNING To prevent SERIOUS INJURY or DEATH from a moving gate: DO NOT disconnect the built-in audio alarm or reset switch. EARTH GROUND ROD INSTALLATION CAUTION To AVOID damaging gas, power, or other underground utility lines, contact underground utility locating companies BEFORE digging. 3 Feet Single piece of 12 gauge wire. Proper grounding gives an electrical charge, such as from an electrical static discharge or a near lightning strike, a path from which to dissipate its energy safely into the earth. Check local codes for proper depth. Without this path, the intense energy generated by lightning could be directed towards the gate operator. Although nothing can absorb the tremendous power of a direct lightning strike, proper grounding can protect the gate operator in most cases. The earth ground rod must be located within 3 feet from the gate operator. Use the proper type earth ground rod for your local area. The ground wire must be a single, whole piece of wire. Never splice two wires for the ground wire. If you should cut the ground wire too short, break it, or destroy its integrity, replace it with a single wire length. 15